1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * Return file offset. 35 * Coordinates with buffering. 36 */ 37 38 #include <sys/feature_tests.h> 39 40 #if !defined(_LP64) 41 #pragma weak ftello64 = _ftello64 42 #endif 43 #pragma weak ftello = _ftello 44 45 #include "synonyms.h" 46 #include "file64.h" 47 #include "mtlib.h" 48 #include <sys/types.h> 49 #include <unistd.h> 50 #include <stdio.h> 51 #include <thread.h> 52 #include <synch.h> 53 #include <errno.h> 54 #include <limits.h> 55 #include <fcntl.h> 56 #include <stddef.h> 57 #include "stdiom.h" 58 59 #if !defined(_LP64) 60 61 off64_t 62 ftello64(FILE *iop) 63 { 64 ptrdiff_t adjust; 65 off64_t tres; 66 rmutex_t *lk; 67 68 FLOCKFILE(lk, iop); 69 if (iop->_cnt < 0) 70 iop->_cnt = 0; 71 if (iop->_flag & _IOREAD) 72 adjust = (ptrdiff_t)-iop->_cnt; 73 else if (iop->_flag & (_IOWRT | _IORW)) { 74 adjust = 0; 75 if (((iop->_flag & (_IOWRT | _IONBF)) == _IOWRT) && 76 (iop->_base != 0)) 77 adjust = iop->_ptr - iop->_base; 78 } else { 79 errno = EBADF; /* file descriptor refers to no open file */ 80 FUNLOCKFILE(lk); 81 return ((off64_t)EOF); 82 } 83 tres = lseek64(FILENO(iop), 0, SEEK_CUR); 84 if (tres >= 0) 85 tres += (off64_t)adjust; 86 FUNLOCKFILE(lk); 87 return (tres); 88 } 89 90 #endif /* _LP64 */ 91 92 off_t 93 ftello(FILE *iop) 94 { 95 return ((off_t)ftell(iop)); 96 } 97